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Flat borosilicate glass plate
The main ingredients of borosilicate glass are sodium oxide,Na2O,B2O3,SiO2, it has low coefficient thermal expansion, good heat resistance and thermal shock resistance, light transmittance is good, and stable chemical and electrical property.
Physical property
Density: 2.23±0.02g/cm3
Coefficient of thermal expansion: (0-300°C) 3.3±0.1x10-6 K-1
Softening point: 820±10°C
Strain point: 516±10°C
Working temperature( short time): 500°C
Working temperature( long time): 450°C
Chemical property
Water resistance: ISO719/DIN12111 HGB1/ISO720 HGA1
Acid resistance: ISO1776/DIN12116 1
Alkali resistance: ISO695/DIN52322 A2
Optical property
Refractive index Nd: 1.47
Electrical property
Dielectric constant: ε=4.7
Specific resistance lgρ: 8.0Ω×cm at 250°C
Dimension
(Any sizes are available on demand)
Thickness
2mm-30mm ( other thickness on demand)